170011121021 has 32 divisors (see below), whose sum is σ = 202365216000. Its totient is φ = 139744023552.

The previous prime is 170011121011. The next prime is 170011121029. The reversal of 170011121021 is 120121110071.

It is a de Polignac number, because none of the positive numbers 2^k-170011121021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170011121029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36661715 + ... + 36666351.

It is an arithmetic number, because the mean of its divisors is an integer number (6323913000).

Almost surely, 2^170011121021 is an apocalyptic number.

It is an amenable number.

170011121021 is a deficient number, since it is larger than the sum of its proper divisors (32354094979).

170011121021 is a wasteful number, since it uses less digits than its factorization.

170011121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5861.

The product of its (nonzero) digits is 28, while the sum is 17.

Adding to 170011121021 its reverse (120121110071), we get a palindrome (290132231092).

The spelling of 170011121021 in words is "one hundred seventy billion, eleven million, one hundred twenty-one thousand, twenty-one".